Automated extraction of oscillation parameters for Kepler observations of solar-type stars (2009)
Huber, Daniel, Stello, Dennis, Bedding, Timothy R., Chaplin, William J., Arentoft, Torben, Quirion, Pierre-Olivier, ...
The recent launch of the Kepler space telescope brings the opportunity to study oscillations systematically in large numbers of solar-like stars. In the framework of the asteroFLAG project, we have...
Stello, Dennis, Chaplin, William J., Bruntt, Hans, Creevey, Orlagh L., García-Hernández, Antonio, ...
CoRoT Measures Solar-Like Oscillations and Granulation in Stars Hotter Than the Sun (2008)
Michel, Eric, Baglin, Annie, Auvergne, Michel, Catala, Claude, Samadi, Reza, Baudin, Frédéric, ...
4 pages, 3 figures.-- Supporting Online Material: Text, Fig. S1, Table S1 and References, available at: http://www.sciencemag.org/cgi/content/full/322/5901/558/DC1
Arentoft, Torben, Kjeldsen, Hans, Bedding, Timothy R., Bazot, Michael, Christensen-Dalsgaard, Joergen, Dall, Thomas H., ...
We have carried out a multi-site campaign to measure oscillations in the F5 star Procyon A. We obtained high-precision velocity observations over more than three weeks with eleven telescopes, with...
Correcting stellar oscillation frequencies for near-surface effects (2008)
Kjeldsen, Hans, Bedding, Timothy R., Christensen-Dalsgaard, Joergen
In helioseismology, there is a well-known offset between observed and computed oscillation frequencies. This offset is known to arise from improper modeling of the near-surface layers of the Sun, and...
Kjeldsen, Hans, Bedding, Timothy R., Christensen-Dalsgaard, Joergen
Oscillations occur in stars of most masses and essentially all stages of evolution. Asteroseismology is the study of the frequencies and other properties of stellar oscillations, from which we can...
The amplitude of solar oscillations using stellar techniques (2008)
Kjeldsen, Hans, Bedding, Timothy R., Arentoft, Torben, Butler, R. Paul, Dall, Thomas H., Karoff, Christoffer, ...
The amplitudes of solar-like oscillations depend on the excitation and damping, both of which are controlled by convection. Comparing observations with theory should therefore improve our...
Hans Kjeldsen, Timothy R. Bedding, R. Paul Butler, Jørgen Christensen-dalsgaard, Laszlo L. Kiss, Chris Mccarthy, ...
We have made velocity observations of the star«Cen B from two sites, allowing us to identify 37 oscillation modes with l = 0–3. Fitting to these modes gives the large and small frequency...
Observing solar-like oscillations (2008)
Bedding, Timothy R., Kjeldsen, Hans
The past few years have seen great progress in observing oscillations in solar-type stars, lying on or just above the main sequence. We review the most recent results, most of which were obtained...
CoRoT measures solar-like oscillations and granulation in stars hotter than the Sun (2008)
Michel, Eric, Baglin, Annie, Auvergne, Michel, Catala, Claude, Samadi, Reza, Baudin, Frédéric, ...
Timothy R. Bedding, R. Paul Butler, Hans Kjeldsen, Ivan K. Baldry, Simon J. O'toole, Christopher G. Tinney, ...
We have made a clear detection of excess power, providing strong evidence for solar-like oscillations in the G2 subgiant fi Hyi. We observed this star over five nights with the UCLES echelle...
Modelling Solar-Like Oscillations in . . . (2007)
Jørgen Christensen-Dalsgaard, Teoretisk Astrofysik, Timothy R. Bedding, Hans Kjeldsen
Kjeldsen et al. (1995, AJ in press) recently obtained strong evidence for solar-like oscillations in the G0 IV star j Boo. Here we present evolution calculations for the star and compare them with...
Near-Surface Effects in Modelling Oscillations of . . . (2007)
Jørgen Christensen-Dalsgaard, Danmarks Grundforskningsfond, Timothy R. Bedding, Günter Houdek, Hans Kjeldsen, Colin Rosenthal, ...
-pressure perturbation. HYD.a Outer structure obtained from horizontal and temporal averaging of a hydrodynamical convection model (e.g. Stein & Nordlund 1991). This was extended into a...
NEW RADIAL VELOCITY CURVES OF roAp AND (2007)
Scuti Stars, Michael Viskum, Ivan K. Baldry, Hans Kjeldsen, Timothy R. Bedding
We present new radial velocity curves of the rapidly oscillating Ap (roAp) star, ff Cir, and the ffi Scuti star, FG Vir, obtained from multisite observations with medium-dispersion spectrographs. The...
Observing Solar-Like Oscillations (2007)
Hans Kjeldsen, Timothy R. Bedding
. We review techniques for measuring stellar oscillations in solartype stars. Despite great efforts, no unambiguous detections have been made. A new method, based on monitoring the equivalent widths...
Observations of solar-like oscillations (2007)
Bedding, Timothy R., Kjeldsen, Hans
There has been tremendous progress in observing oscillations in solar-type stars. In a few short years we have moved from ambiguous detections to firm measurements. We briefly review the recent...
Solar-like oscillations in the G2 subgiant beta Hydri from dual-site observations (2007)
Bedding, Timothy R., Kjeldsen, Hans, Arentoft, Torben, Bouchy, Francois, Brandbyge, Jacob, Brewer, Brendon J., ...
We have observed oscillations in the nearby G2 subgiant star beta Hyi using high-precision velocity observations obtained over more than a week with the HARPS and UCLES spectrographs. The oscillation...
Asteroseismology from solar-like oscillations (2007)
Bedding, Timothy R., Kjeldsen, Hans
There has been tremendous progress in observing oscillations in solar-type stars. In a few short years we have moved from ambiguous detections to firm measurements. We briefly review the recent...
Observations of solar-like oscillations (2006)
Bedding, Timothy R., Kjeldsen, Hans
There has been tremendous progress in observing oscillations in solar-type stars. In a few short years we have moved from ambiguous detections to firm measurements. We review the recent results, most...
Bayesian Inference from Observations of Solar-Like Oscillations (2006)
Brewer, Brendon J., Bedding, Timothy R., Kjeldsen, Hans, Stello, Dennis
Stellar oscillations can provide a wealth of information about a star, which can be extracted from observed time series of the star's brightness or radial velocity. In this paper we address the...
Butler, R. Paul, Bouchy, Francois, Brewer, Brendon J, Eggenberger, Patrick, ...
Asteroseismology is a powerful method for determining fundamental properties of stars. We report the first application to a metal-poor object, namely the subgiant star nu Ind. We measured precise...
Bedding, Timothy R., Butler, R. Paul, Carrier, Fabien, Bouchy, Francois, Brewer, Brendon J., Eggenberger, Patrick, ...
Asteroseismology is a powerful method for determining fundamental properties of stars. We report the first application to a metal-poor object, namely the subgiant star nu Ind. We measured precise...
Bedding, Timothy R., Butler, R. Paul, Carrier, Fabien, Bouchy, Francois, Brewer, Brendon J., Eggenberger, Patrick, ...
Asteroseismology is a powerful method for determining fundamental properties of stars. We report the first application to a metal-poor object, namely the subgiant star nu Ind. We measured precise...
Bedding, Timothy R., Butler, R. Paul, Carrier, Fabien, Bouchy, Francois, Brewer, Brendon J., Eggenberger, Patrick, ...
Asteroseismology is a powerful method for determining fundamental properties of stars. We report the first application to a metal-poor object, namely the subgiant star nu Ind. We measured precise...
Bedding, Timothy R., Butler, R. Paul, Carrier, Fabien, Bouchy, Francois, Brewer, Brendon J., Eggenberger, Patrick, ...
Asteroseismology is a powerful method for determining fundamental properties of stars. We report the first application to a metal-poor object, namely the subgiant star nu Ind. We measured precise...
Observing solar-like oscillations: recent results (2005)
Bedding, Timothy R., Kjeldsen, Hans
We review recent progress in observations of ground-based oscillations. Excellent observations now exist for a few stars (alpha Cen A and B, mu Ara), while there is some controversy over others...
Solar-like oscillations in alpha Centauri B (2005)
Kjeldsen, Hans, Bedding, Timothy R., Butler, R. Paul, Christensen-Dalsgaard, Joergen, Kiss, Laszlo L., McCarthy, Chris, ...
We have made velocity observations of the star alpha Cen B from two sites, allowing us to identify 37 oscillation modes with l=0-3. Fitting to these modes gives the large and small frequency...
Oscillation frequencies and mode lifetimes in alpha Centauri A (2004)
Bedding, Timothy R., Kjeldsen, Hans, Butler, R. Paul, McCarthy, Chris, Marcy, Geoffrey W., O'Toole, Simon J., ...
We analyse our recently-published velocity measurements of alpha Cen A (Butler et al. 2004). After adjusting the weights on a night-by-night basis in order to optimize the window function to minimize...
A Tight Upper Limit on Oscillations in the Ap star Epsilon Ursae Majoris from WIRE Photometry (2003)
Retter, Alon, Bedding, Timothy R., Buzasi, Derek L., Kjeldsen, Hans, Kiss, Laszlo L.
Observations of Epsilon UMa obtained with the star tracker on the Wide Field Infrared Explorer (WIRE) satellite during a month in mid-2000 are analyzed. This is one of the most precise photometry of...
Ultra-high-precision velocity measurements of oscillations in alpha Cen A (2003)
Butler, R. Paul, Bedding, Timothy R., Kjeldsen, Hans, McCarthy, Chris, O'Toole, Simon J., Tinney, Christopher G., ...
We have made differential radial velocity measurements of the star alpha Cen A using two spectrographs, UVES and UCLES, both with iodine absorption cells for wavelength referencing. Stellar...
Erratum: "Oscillations in Arcturus from WIRE photometry" (ApJ, 591, L151 [2003]) (2003)
Retter, Alon, Bedding, Timothy R., Buzasi, Derek L., Kjeldsen, Hans, Kiss, László L.
The value of the mode lifetime given in the first paragraph of the Discussion should be divided by 2pi and is therefore 2.0 days rather than 13 days.
Solar-like Oscillations (Invited Review) (2003)
Bedding, Timothy R., Kjeldsen, Hans
The five-minute oscillations in the Sun have provided a wealth of information about the solar interior. After many attempts, positive detections of similar oscillations in solar-type stars have now...
Timothy R. Bedding, Hans Kjeldsen, R. Paul Butler, Chris Mccarthy, Geoffrey W. Marcy, Simon J. O’toole, ...
We analyze our recently published velocity measurements of Cen A. After adjusting the weights on a nightby-night basis in order to optimize the window function to minimize sidelobes, we extract 42...
Evidence for Solar-like Oscillations in Arcturus (Alpha Boo) (2002)
Retter, Alon, Bedding, Timothy R., Buzasi, Derek, Kjeldsen, Hans
Observations of the red giant Arcturus (Alpha Boo) obtained with the star tracker on the Wide Field Infrared Explorer (WIRE) satellite during a baseline of 19 successive days in 2000 July-August are...
Evidence for solar-like oscillations in beta Hydri (2000)
Bedding, Timothy R., Butler, R. Paul, Kjeldsen, Hans, Baldry, Ivan K., O'Toole, Simon J., Tinney, Christopher G., ...
We have made a clear detection of excess power, providing strong evidence for solar-like oscillations in the G2 subgiant beta Hyi. We observed this star over five nights with the UCLES echelle...
Current status of Asteroseismology (2000)
Kjeldsen, Hans, Bedding, Timothy R.
Oscillation frequencies are the most accurate properties one can measure for a star, potentially allowing detailed tests of stellar models and evolution theories. We briefly review asteroseismology...
Bedding, Timothy R., Kjeldsen, Hans
The MONS satellite will have two Star Trackers to sense the spacecraft attitude, and we plan to use them as scientific instruments to perform high-precision photometry of thousands of stars. We...
Time-series Spectroscopy of EC14026 Stars: Preliminary Results (1999)
O'Toole, Simon J., Teixeira, Teresa C., Bedding, Timothy R., Kjeldsen, Hans
We have obtained time-series spectra for the pulsating hot subdwarf (sdB) PG1605+072. Previous time-series photometry of this star has shown maximum amplitude variations of about 0.1 mag and at least...
A search for solar-like oscillations in alpha Cen A (1997)
Bedding, Timothy R., Kjeldsen, Hans, Frandsen, S., Dall, T. H.
We have been using a new method to search for solar-like oscillations that involves measuring temperature changes via their effect on the equivalent widths of the Balmer hydrogen lines. We observed...
Solar-like oscillations: the search goes on (1997)
Bedding, Timothy R., Kjeldsen, Hans
Despite numerous attempts and many hours of telescope time, there has so far been no confirmed detection of solar-like oscillations in any star except the Sun. We review recent efforts, with...
Hipparcos parallaxes for eta Boo and kappa_2 Boo: two successes for asteroseismology (1997)
Bedding, Timothy R., Kjeldsen, Hans, Christensen-Dalsgaard, Joergen
The release of the Hipparcos catalogue provides an opportunity to check results from asteroseismology. Here we show that Hipparcos parallaxes for two stars are in good agreement with oscillation...
Observing solar-like oscillations (1997)
Kjeldsen, Hans, Bedding, Timothy R.
We review techniques for measuring stellar oscillations in solar-type stars. Despite great efforts, no unambiguous detections have been made. A new method, based on monitoring the equivalent widths...
Solar-like oscillations in eta Boo (1994)
Kjeldsen, Hans, Bedding, Timothy R., Viskum, Michael, Frandsen, Soeren
We have observed evidence for $p$-mode oscillations in the G0 IV star etaBoo (V = 2.68). This represents the first clear evidence of solar-like oscillations in a star other than the Sun. We used a...
High-precision photometry : techniques and results /
Thesis (doctoral)--Aarhus University, 1992.